Doughnut



FIG. 1 is a perspective view of a doughnut comprising the present invention;

FIG. 2 is a top plan view;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof. 

I claim the ornamental design for a doughnut, as shown. 